Accession Number:

AD0742305

Title:

Transport and Stability of a Vortex Wake

Descriptive Note:

Final rept.

Corporate Author:

METEOROLOGY RESEARCH INC ALTADENA CA

Personal Author(s):

Report Date:

1972-04-17

Pagination or Media Count:

74.0

Abstract:

The influence of the atmospheric environment on the transport and decay of a trailing vortex wake has been studied analytically and experimentally during a two-year long research program. An analytical model describing the descending motion of an entraining wake in a stably stratified atmosphere has been developed. This model was compared with several other recent theoretical analyses and with limited experimental observations in order to determine the validity. A flight test program was carried out in which the smoke-marked vortices behind a lightplane were observed in an atmosphere of measured turbulence and stratification. The descending motion of the wake was also measured, as was the vortex spacing during the descent. The results of these tests are compared with those of some small-scale model experiments and of some large aircraft flight tests.

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE